Engine bay undertray aerodynamics
Some time ago I started to do some CFD analysis to see if I could do any simple changes that improved the aerodynamic properties of the car, without altering its appearance too much. It turned out that I had…
15 ENTRIES / 2014
Caterham CSR Trackday toy: 2014
Trackdays, workshop projects and updates from 2014.
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MOT, autumn and nothing much
The yearly MOT was a bit different. First attempt they refused to inspect the car as the guy said he'd not manage to get into the car as he was too big. So he sent me home with my money back. I'll never use…
My wheel fell off on a trackday
At 137 km/h coming into a long right turn, my inner rear wheel fell off. A loud clonk and I could see how the inner rear wheel was bypassing me! I slowed down slowly standing on three wheels and could keep the…
New rims with stickers on
New 13" rims from Force Racing, 7" and 9" wide with brand new Dunlop slicks - "stickers". I bought the rims directly from Force Racing this time and they were very easy to deal with and I can really recommend…
Gearbox disaster
My gearbox failed with a bang on on the King of Mantorp TA-event . Totally unexpected on the day's last cooldown lap. Looking at the log file I didn't even have 50% throttle when it happened. The good news was…
TimeAttack - "King of Mantorp"
Valtonen Motorsport RX-8 Normally I don't like to compete but somehow I participated a Time Attack competition this weekend. Seven type cars are not allowed in their series, but this time they had a "no…
Intake cone filter and air pressure
The Pipercross airbox I bough was supplied with a built in air-filter rated up to 200 hp. As don't want to strangle my engine I now have fitted a cone filter with larger filter area. 102mm to 80mm silicone…
Attempt to redirect exhaust noise
As I previously wrote my noise levels are now down to 94-96 dbA on the intake side and 101 dbA on the exhaust side. In an attempt to reduce the latter I did a quick test to fit a 90° steel tube and point the…
Intake airbox
As I wrote in the previous post the track noise regulations in Sweden has become much harder lately. The current limit is 95 dBA drive-by measured from a 10 m distance. I've fitted a Raceco silencer and now a…
Raceco silencer
The track noise regulations in Sweden has become much harder lately. The current limit is 95 dBA drive by measured from a 10 m distance. This limit is set by the SBF (Swedish motorsport federation) for all…
Rear diffusor and front splitter inspiration
I more or less gave up on my CFD simulations . At least for a while. I could not get consistent results and the obstacles were just too many to keep me carry on. But before I gave up I did some simulations…
Aerodynamics - CFD simulations
After some vacation reading of the book " Race car aerodynamics " I have had lots of thoughts of how to improve the car's aerodynamics, especially the lack of down force. The common approach on this subject is…
Fuel system with Swirlpot
It was not long ago I uprated my fuel pump and since then I only used my car once. But I never felt satisfied with the new system. I feared the fuel surge while cornering problem would be even worse than…
Oil filler cap lock
It has happened more than once that the oil filler cap jump loose and spew oil on the exhaust primaries. Hopefully this will fix
Oil temperature sender
I'm reading a book right now that among other things has a lot to say about oil. One of the things it says is: "An engine should never be driven hard until the oil reaches 70°C". And later: "In a race engine,…